disable OptinMonster campaigns for visitors with specific user roles

function om_docs_hide_optin_for_user_roles( $campaigns ) {

    // Do nothing if no user is logged in.

    if ( ! is_user_logged_in() ) {

	return $campaigns;

    }

    // Change these as necessary.

    $roles_to_check = array( 'administrator', 'subscriber' );

    // Get the current user.

    $user = wp_get_current_user();

    if ( ! empty( $user->roles ) && is_array( $user->roles ) ) {

        $has_role = array_intersect( $roles_to_check, $user->roles );

	if ( ! empty( $has_role ) ) {

		// Remove all campaigns for these particular roles.

		$campaigns = array();

	}

    }

    // Return the potentially modified campaigns.

    return $campaigns;

    }

add_filter( 'optin_monster_api_final_output', 'om_docs_hide_optin_for_user_roles' );